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\bibcite{das2012finding}{\citeauthoryear {Das\nobreakspace  {}Sarma \bgroup \em  et al.\egroup }{2012}}
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\bibcite{gupta11}{\citeauthoryear {Gupta and Sarawagi}{2011}}
\bibcite{gusfield1997algorithms}{\citeauthoryear {Gusfield}{1997}}
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\bibcite{venetis2011recovering}{\citeauthoryear {Venetis \bgroup \em  et al.\egroup }{2011}}
\bibcite{wang1994complexity}{\citeauthoryear {Wang and Jiang}{1994}}
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